EP4067912A4 - Capacitance reference line update method, and chip and capacitance measurement apparatus - Google Patents

Capacitance reference line update method, and chip and capacitance measurement apparatus Download PDF

Info

Publication number
EP4067912A4
EP4067912A4 EP21867867.0A EP21867867A EP4067912A4 EP 4067912 A4 EP4067912 A4 EP 4067912A4 EP 21867867 A EP21867867 A EP 21867867A EP 4067912 A4 EP4067912 A4 EP 4067912A4
Authority
EP
European Patent Office
Prior art keywords
capacitance
chip
reference line
measurement apparatus
update method
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21867867.0A
Other languages
German (de)
French (fr)
Other versions
EP4067912A1 (en
Inventor
Juan Ai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Goodix Technology Co Ltd
Original Assignee
Shenzhen Goodix Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Goodix Technology Co Ltd filed Critical Shenzhen Goodix Technology Co Ltd
Publication of EP4067912A1 publication Critical patent/EP4067912A1/en
Publication of EP4067912A4 publication Critical patent/EP4067912A4/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/955—Proximity switches using a capacitive detector
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
    • G01D5/2403—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by moving plates, not forming part of the capacitor itself, e.g. shields
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/962—Capacitive touch switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
    • H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
    • H03K2217/9401—Calibration techniques
    • H03K2217/94031—Calibration involving digital processing

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electronic Switches (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
EP21867867.0A 2021-02-07 2021-02-07 Capacitance reference line update method, and chip and capacitance measurement apparatus Pending EP4067912A4 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/075882 WO2022165816A1 (en) 2021-02-07 2021-02-07 Capacitance reference line update method, and chip and capacitance measurement apparatus

Publications (2)

Publication Number Publication Date
EP4067912A1 EP4067912A1 (en) 2022-10-05
EP4067912A4 true EP4067912A4 (en) 2022-10-19

Family

ID=82741950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21867867.0A Pending EP4067912A4 (en) 2021-02-07 2021-02-07 Capacitance reference line update method, and chip and capacitance measurement apparatus

Country Status (3)

Country Link
US (1) US20220260393A1 (en)
EP (1) EP4067912A4 (en)
WO (1) WO2022165816A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023013710A (en) * 2021-07-16 2023-01-26 アルプスアルパイン株式会社 Contact determination device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102855032B (en) * 2011-06-27 2016-03-02 比亚迪股份有限公司 Baseline update method and contactor control device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101963873B (en) * 2010-10-08 2012-10-10 展触光电科技股份有限公司 Method for setting and calibrating capacitive-type touch panel capacitance base value
CN109601015B (en) * 2017-07-31 2022-06-07 深圳市汇顶科技股份有限公司 Touch screen reference determination method and device, touch screen and electronic terminal
US10795518B2 (en) * 2018-10-30 2020-10-06 Synaptics Incorporated Baseline update for input object detection
JP7120725B2 (en) * 2018-11-14 2022-08-17 アルパイン株式会社 ELECTRONIC DEVICE WITH TOUCH PANEL, BASELINE VALUE UPDATE METHOD AND UPDATE PROGRAM

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102855032B (en) * 2011-06-27 2016-03-02 比亚迪股份有限公司 Baseline update method and contactor control device

Also Published As

Publication number Publication date
EP4067912A1 (en) 2022-10-05
US20220260393A1 (en) 2022-08-18
WO2022165816A1 (en) 2022-08-11

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